The IUPAC name of the complex is $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}\left(\mathrm{NH}_{2} \mathrm{CH}_{3}\right)\right] \mathrm{Cl}$ is

(A) Diamminechlorido(aminomethane)platinum(II)chloride

(C) Diammine(methanamine)chlorido platinum(II)chloride

(D) Bisammine(methanamine)chloride platinum(II)chloride

JEE Main · 2020 · 07 Jan 2020 · Shift 1 · Coordination Compounds

The IUPAC name of the complex is

[Pt (NH_{3})_{2} Cl (NH_{2} CH_{3})] Cl

(A)Diamminechlorido(aminomethane)platinum(II)chloride
(B)Diamminechlorido(methanamine)platinum(II)chloride✓ Correct
(C)Diammine(methanamine)chlorido platinum(II)chloride
(D)Bisammine(methanamine)chloride platinum(II)chloride

Answer: (B)

Solution

The cation

[Pt (N H_{3})_{2} Cl (N H_{2} C H_{3})]^{+}

has platinum in the

+ 2

state, found by balancing two neutral ammines, one chlorido and one neutral methanamine against the outer chloride. Naming the ligands alphabetically — ammine, chlorido, then methanamine — and adding the oxidation state and the counter-ion gives diamminechlorido(methanamine)platinum(II) chloride.

JEE Main · 2020 · 07 Jan 2020 · Shift 1 · Single correct option

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